Alps Tunnel Reaches 50km Mark

Deep under the French-Italian Alps, the Turin-Lyon rail tunnel has passed a round number that sounds more conclusive than it is. Workers have now excavated 50 kilometres of underground galleries, forcing their way through some of the hardest rock in Europe as part of a project that will eventually involve two 57.5km tubes (FS Italiane).

The engineering is serious. The conclusion is less simple. Much of the 50km already dug is made up of access shafts, safety passages and preparatory works. The main tunnel is still less than half finished. Europe can bore through the mountain. The harder question is whether it can build the transport system around the tunnel that makes freight companies actually use it.

Why flat tunnels matter for freight

Railways do not like mountains. Steep climbs, tight curves and long descents limit the weight of trains, slow them down and make timetables harder to rely on. A base tunnel changes that by cutting low and flat through the rock. It allows longer, heavier freight trains to cross the Alps with fewer locomotives and fewer operational headaches.

Turin-Lyon sits on the Mediterranean Corridor, one of the nine routes in TEN-T, the Trans-European Transport Network through which the EU tries to stitch national rail systems into a continental grid (European Commission). TELT, the Franco-Italian body running the works, says the completed line could take more than 1 million lorries off Alpine roads each year and cut CO₂ emissions by 1 million tonnes annually (FS Italiane).

For passengers, the gains are easier to imagine. Today, just two direct Lyon-Turin trains run each day, taking about 4 hours and 25 minutes on average (SNCF Connect). A flatter, faster route would be a clear improvement. Freight is more stubborn. A new line creates the possibility of change, but it does not by itself move goods from road to rail.

Austria built tunnels. Trucks kept coming.

The Brenner corridor, about 500km to the east, is the warning. Around 2.42 million heavy lorries crossed the Brenner pass in 2025, while rail's share of freight on the same corridor fell from 36% in 2010 to 25% in 2023 (MeinBezirk). More infrastructure and more policy effort did not push enough goods onto trains. In the first half of 2026, truck traffic rose by another 3.6% (VerkehrsRundschau).

Switzerland shows what the missing lever looks like. The Swiss have paired their Alpine tunnels with the LSVA, a distance-based charge on heavy vehicles that makes road haulage genuinely more expensive (Bundesamt für Verkehr). Around 858,000 lorries crossed all four Swiss Alpine passes in 2025, roughly a third of the Brenner figure (MeinBezirk).

That is the mechanism Turin-Lyon will need. Infrastructure creates capacity. Pricing decides whether that capacity is used. Without road charges that reflect wear, pollution and congestion, many shippers will still choose trucks because road haulage is often quicker, more flexible and delivers door to door.

The tunnel is not the corridor

The cross-border section is budgeted at around €11 billion, with the EU covering roughly 50%, Italy 30% and France 20% (TrasportoEuropa). That gives Brussels a large stake in the project, and not just financially. TEN-T corridors are meant to prove that EU transport policy can turn national rail networks into a working European system.

But the tunnel alone does not make a corridor. French access lines linking it properly to Lyon may not arrive before 2045, even if the bore itself opens around 2033-2035 (Le Progrès). The European Court of Auditors has warned that cross-border rail megaprojects lose their value in exactly this way: the central piece is built, the connecting sections are delayed, and national governments fail to finish their share of the job (European Court of Auditors).

The full cost of the corridor remains unclear. Auditors put it at €26 billion or more as far back as 2012, and no updated total has appeared since (European Court of Auditors).

Who gains, who pays

The case for the tunnel starts with a real constraint. Large-scale rail freight across this part of the Alps cannot work properly without a flatter crossing. The likely winners are rail freight operators, Mediterranean ports, manufacturers along the route and passengers who would get much shorter journey times. The bill falls on taxpayers in France, Italy and across the EU.

For Ireland, the project is a reminder of what the single market depends on beyond rules and treaties. A peripheral island economy lives by functioning European logistics, even when the infrastructure is nowhere near Dublin Port or Rosslare. But the same lesson applies here as on the Continent: a corridor is only as strong as its weakest connection.

Every lorry-removal and CO₂ figure attached to Turin-Lyon is still a forecast. Those forecasts depend on access lines, freight terminals, reserved train slots and road pricing that makes rail the rational choice. Fifty kilometres of galleries under the Alps is an engineering achievement. Turning that excavation into a transport system freight operators choose over trucks is the more difficult work, and it has barely begun.